.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.input-group input[type="text"] {
    width: 100%;
    padding: 20px;
    font-size: 1.2em;
    margin: 10px 0;
    border: 1px solid #666;
}

.btn {
    display: block;
    width: 100%;
    padding: 20px;
    background: #f0f0f0;
    border: 2px solid #333;
    text-align: center;
    text-decoration: none;
    color: #333;
    margin: 10px 0;
    font-size: 1.2em;
}

.article-list {
    margin-top: 20px;
}

.article-item {
    display: table;
    width: 80%;
    margin: 20px auto;
    border-bottom: 1px solid #ddd;
    padding: 10px 0;
}

.article-content {
    display: table-cell;
    width: 70%;
    padding-left: 15px;
    vertical-align: top;
}

.pagination {
    text-align: center;
    margin: 20px 0;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}
.article-content img {
    max-width: 100%;
    height: auto;
    margin: 10px 0;
}

.post-body code {
    display: inline-block;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: monospace;
    background: #f5f5f5;
    padding: 2px 5px;
    border: 1px solid #ddd;
    margin: 2px 0;
    max-width: 100%;
    overflow-x: auto;
}

.post-body pre {
    margin: 15px 0;
    padding: 10px;
    background: #f8f8f8;
    border: 1px solid #ccc;
    overflow-x: auto;
}

.post-body pre code {
    display: block;
    white-space: pre;
    word-wrap: normal;
    padding: 0;
    margin: 0;
    border: none;
    background: none;
}

.back-btn {
    text-align: center;
    margin-top: 20px;
}

.post-title {
    font-size: 1.8em;
    margin-bottom: 1.2em;
    text-align: center;
}

.post-body {
    font-size: 1.1em;
    line-height: 1.8;
    text-align: justify;
}

.post-body p {
    margin: 1em 0;
}

.error-msg {
    color: #cc0000;
    text-align: center;
    margin: 30px 0;
}

.quick-links-title {
    text-align: center;
    border-bottom: 1px solid #333;
    padding-top: 25px;
    padding-bottom: 15px;
    margin: 30px 0;
}

.quick-links {
    display: block;
    width: 100%;
    margin: 0 auto;
    padding: 20px 0;
    text-align: center;
}

.quick-btn {
    display: block;
    width: 80%;
    margin: 0 auto 15px; 
    padding: 18px 20px;
    background: #fff;
    border: 2px solid #666;
    border-radius: 3px;
    text-decoration: none;
    color: #333;
    font-size: 1.6em;
    min-height: 60px;
    text-align: center;
    box-sizing: border-box;
}

.category-title {
    text-align: center;
    margin: 20px 0 30px;
    font-size: 1.4em;
    color: #444;
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
}